Montblanc black gold Celluloid Platinum fountain pen Made in Italy 1920's AVD Pirelli

Vintage RARE Montblanc black gold Celluloid fountain pen Made in Italy 1920's original nib with 'Montblanc' 'fabbricato in italia' on the body of the pen. On the body is engraved  is adv for Pirelli the famous Tyres italian. the classic mound on the hood is not present. Typical of Montblanc made in Italy. Number 4 on the bottom and  the nib is gold and number 4.